Insulation structure for cylindrical battery

Abstract

The utility model provides an insulation structure for a cylindrical battery, which comprises a gasket body and a positioning boss, and the gasket body is provided with a first center hole; the positioning boss is arranged on the end face of one axial side of the gasket body in a protruding mode and used for being matched with a second center hole of the roll core so that the insulation structure can be positioned and installed on the roll core. Wherein a first avoiding via hole is formed in the positioning boss, and the first avoiding via hole is communicated with the first center hole. According to the utility model, the problems that the insulation spacer is easy to displace and the short circuit phenomenon is very easy to occur in the battery due to the unreasonable structure of the insulation spacer in the battery in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of battery structure technology, and more specifically, to an insulating structure for cylindrical batteries. Background Technology

[0002] Batteries are widely used in new energy fields such as portable electronic devices, electric vehicles, and energy storage systems. As the power source of new energy, their safety is of paramount importance. Therefore, higher requirements are placed on the safety of battery cores, such as preventing short circuits and leakage. During the assembly process, insulating gaskets need to be placed between the core and the casing. The insulating gaskets are mainly used to isolate the core and the positive electrode inside the battery, thereby preventing short circuits inside the battery and ensuring the safe operation of the battery.

[0003] However, the existing insulation pad design is unreasonable, which makes the insulation pad easy to shift inside the battery. Especially when the battery is subjected to vibration or external impact, the displacement of the insulation pad will be greater, which will reduce the safety margin on the positive side of the battery. If the core comes into contact with the shell, it may cause a short circuit risk, seriously affect the performance of the battery, or even cause a safety accident, threatening the life and property safety of users. Utility Model Content

[0004] The main objective of this invention is to provide an insulation structure for cylindrical batteries, thereby solving the problem that the structure of the insulating pads inside batteries in the prior art is unreasonable, which leads to the easy displacement of the insulating pads and causes short circuits to easily occur inside the battery.

[0005] To achieve the above objectives, this utility model provides an insulation structure for cylindrical batteries, including a gasket body and a positioning boss. The gasket body has a first central hole. The positioning boss protrudes from one axial end face of the gasket body and is used to cooperate with the second central hole of the winding core to position and install the insulation structure on the winding core. The positioning boss has a first clearance through hole that communicates with the first central hole.

[0006] In an exemplary embodiment, a limiting portion is provided on the outer peripheral surface of the positioning boss, which is used to cooperate with the hole wall surface of the second center hole of the winding core.

[0007] In one exemplary embodiment, the limiting part is an elastic element.

[0008] In an exemplary embodiment, the limiting portion is a limiting strip that protrudes from the outer peripheral surface of the positioning boss, and the limiting strip extends along the axial direction of the positioning boss.

[0009] In one exemplary embodiment, there are multiple limiting strips, which are evenly distributed around the circumference of the positioning boss.

[0010] In an exemplary embodiment, the limiting portion is a limiting block protruding from the outer peripheral surface of the positioning boss, and the limiting block extends radially along the positioning boss.

[0011] In one exemplary embodiment, there are multiple limiting blocks, which are spaced apart along the axial and circumferential directions of the positioning boss.

[0012] In one exemplary embodiment, the outer surface of the limiting portion has an anti-slip texture to increase the friction between the limiting portion and the wall surface of the second center hole of the winding core.

[0013] In one exemplary embodiment, the gasket body and the positioning boss are concentrically arranged, and the gasket body and the positioning boss are integrally formed.

[0014] In one exemplary embodiment, the axial thickness of the gasket body is less than the axial thickness of the positioning boss in the axial direction.

[0015] In an exemplary embodiment, the gasket body is further provided with a second clearance through hole, which is located on the outer periphery of the first central hole and is circular, and is used to prevent the inflow of electrolyte; and / or, the gasket body is further provided with a third clearance through hole, which is located on the outer periphery of the first central hole and is arc-shaped, and is used to prevent the tabs of the winding core.

[0016] This invention provides an insulation structure for cylindrical batteries, comprising a gasket body and a positioning boss. The gasket body has a first central hole. The positioning boss protrudes from one axial end face of the gasket body and engages with a second central hole of the winding core to position the insulation structure onto the winding core. A first clearance through hole is provided on the positioning boss, communicating with the first central hole. By providing a positioning boss protruding from one axial end face of the gasket body and engaging with the second central hole of the winding core, the insulation structure is positioned and installed on the winding core, ensuring the reliability of the insulation structure's positioning and preventing displacement after connection. This ensures the internal insulation reliability of the cylindrical battery and its safety in use. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of an insulation structure according to an alternative embodiment of the present invention is shown;

[0019] Figure 2 It shows Figure 1 A schematic diagram of the insulation structure from the front view;

[0020] Figure 3 It shows Figure 1 A schematic diagram of the positioning boss in the insulation structure.

[0021] The above figures include the following reference numerals:

[0022] 10. Gasket body; 11. Second clearance through hole; 12. Third clearance through hole;

[0023] 20. Positioning boss; 21. Limiting part;

[0024] 30. First avoidance through hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] To address the problem that the insulation pads inside batteries in existing technologies are structurally flawed, leading to easy displacement of the insulation pads and consequently short circuits inside the battery, this invention provides an insulation structure for cylindrical batteries.

[0027] like Figures 1 to 3 As shown, the insulation structure for a cylindrical battery includes a gasket body 10 and a positioning boss 20. The gasket body 10 has a first central hole. The positioning boss 20 protrudes from one axial end face of the gasket body 10 and is used to cooperate with the second central hole of the winding core to position and install the insulation structure on the winding core. The positioning boss 20 has a first clearance through hole 30, which communicates with the first central hole.

[0028] By providing a positioning boss 20 protruding from one end face of the axial side of the gasket body 10, and the positioning boss 20 being used to cooperate with the second center hole of the winding core, the insulation structure is positioned and installed on the winding core, ensuring the positioning reliability of the insulation structure and ensuring that the insulation structure will not be displaced after being connected to the winding core, thereby ensuring the internal insulation reliability of the cylindrical battery and ensuring the safety of the cylindrical battery in use.

[0029] It should be noted that in this application, the outer peripheral surface of the positioning boss 20 is provided with a limiting part 21, which is used to mate with the hole wall surface of the second center hole of the winding core. This helps to increase the friction between the positioning boss 20 of the insulation structure and the hole wall surface of the second center hole of the winding core, thereby ensuring the positioning reliability and installation stability of the insulation structure.

[0030] Preferably, the limiting part 21 is an elastic element. In this way, when subjected to the pressure of the hole wall surface of the second center hole of the winding core, a restoring force can be generated. This characteristic ensures that the insulation structure can return to its original shape when subjected to external force, maintain its tight contact with the winding core, and effectively prevent the decrease in the fixing effect due to long-term use. It is suitable for battery systems that operate stably for a long time, such as electric vehicles and base station energy storage.

[0031] like Figure 3 As shown, the limiting part 21 is a limiting strip protruding from the outer peripheral surface of the positioning boss 20, and the limiting strip extends along the axial direction of the positioning boss 20. There are multiple limiting strips, which are evenly distributed around the circumference of the positioning boss 20. In this way, sufficient contact area is ensured between the positioning boss 20 and the hole wall surface of the second center hole of the core, thereby ensuring the positioning reliability and installation stability of the insulation structure.

[0032] It should be noted that, in this application, the size design of the positioning boss 20 can be adapted to the second center hole of the core with a diameter range of 10 to 20 mm. This design flexibility allows the insulation structure to be adapted to cores of different sizes, improving its versatility and making it suitable for standardized and modular production in the battery industry, reducing production costs and time waste caused by size mismatch.

[0033] It should be noted that, in an embodiment not shown in this application, the limiting part 21 is a limiting block protruding from the outer peripheral surface of the positioning boss 20, and the limiting block extends radially along the positioning boss 20. There are multiple limiting blocks, which are spaced apart axially and circumferentially along the positioning boss 20. This ensures sufficient contact area between the positioning boss 20 and the wall surface of the second central hole of the core, thereby ensuring the positioning reliability and installation stability of the insulation structure.

[0034] It should be noted that, in one embodiment of this application (not shown), the outer surface of the limiting part 21 has an anti-slip texture.

[0035] This increases the friction between the limiting part 21 and the wall surface of the second center hole of the core.

[0036] Optionally, the shape and design of the anti-slip texture may further include, but are not limited to, wavy, serrated, or mesh structures. These texture designs increase the friction between the insulation structure and the hole wall of the second center hole of the core, further improving the fixation effect and maintaining the stability of the cylindrical battery even under extreme conditions. Suitable for high-performance batteries, such as those used in drones, power tools, and other applications requiring high vibration and shock resistance.

[0037] It should be noted that in this application, the gasket body 10 and the positioning boss 20 are concentrically arranged, and the gasket body 10 and the positioning boss 20 are integrally formed. This ensures the compatibility between the insulation structure and the winding core.

[0038] like Figure 1 As shown, the axial thickness of the gasket body 10 is less than the axial thickness of the positioning boss 20. This ensures that the positioning boss 20 can extend as far as possible into the second center hole of the winding core, ensuring the reliability of the positioning and limiting of the second center hole of the winding core for the insulation structure, thereby ensuring the stable positioning and installation of the insulation structure.

[0039] like Figure 1 As shown, the gasket body 10 also has a second clearance through hole 11, which is located on the outer periphery of the first central hole. The second clearance through hole 11 is circular and is used to prevent the inflow of electrolyte. And / or, the gasket body 10 also has a third clearance through hole 12, which is located on the outer periphery of the first central hole and is arc-shaped. The third clearance through hole 12 is used to prevent the tabs of the wound core from entering. Thus, the second clearance through hole 11 ensures that electrolyte can be added to the cylindrical battery laterally; the third clearance through hole 12 ensures reliable protection of the tabs of the wound core.

[0040] This application provides an insulation structure for a cylindrical battery, including a gasket body 10 and a positioning boss 20. The gasket body 10 has a first central hole. The positioning boss 20 protrudes from one axial end face of the gasket body 10 and is used to cooperate with a second central hole of the winding core to position and install the insulation structure on the winding core. The positioning boss 20 has a first clearance through hole 30 that communicates with the first central hole. By providing a positioning boss 20 protruding from one axial end face of the gasket body 10 and cooperating with the second central hole of the winding core, the insulation structure is positioned and installed on the winding core, ensuring the reliability of the insulation structure's positioning and preventing displacement after connection with the winding core. This ensures the internal insulation reliability of the cylindrical battery and the safety of its use.

[0041] The insulation structure provided in this application has a self-positioning function. By setting the positioning boss 20, the positioning and installation of the insulation structure is guaranteed, preventing displacement of the insulation structure. In addition, by setting the limiting part 21 protruding on the outer peripheral surface of the positioning boss 20, the friction between the insulation structure and the hole wall of the second center hole of the core is greatly increased, thereby ensuring the installation stability of the insulation structure. Furthermore, by designing anti-slip texture on the limiting part 21, the friction between the outer peripheral surface of the positioning boss 20 and the hole wall of the second center hole of the core is further improved, thereby ensuring the positioning and installation stability of the insulation structure.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0044] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An insulating structure for cylindrical batteries, characterized in that, include: Gasket body (10), wherein a first central hole is provided on the gasket body (10); A positioning boss (20) is provided on one side of the axial end face of the gasket body (10). The positioning boss (20) is used to cooperate with the second center hole of the core to position and install the insulation structure on the core. The positioning boss (20) is provided with a first clearance hole (30), which is connected to the first center hole.

2. The insulation structure according to claim 1, characterized in that, The outer peripheral surface of the positioning boss (20) is provided with a limiting part (21), which is used to cooperate with the hole wall surface of the second center hole of the core.

3. The insulation structure according to claim 2, characterized in that, The limiting part (21) is an elastic element.

4. The insulation structure according to claim 2, characterized in that, The limiting part (21) is a limiting strip that protrudes from the outer peripheral surface of the positioning boss (20) and the limiting strip extends along the axial direction of the positioning boss (20).

5. The insulation structure according to claim 4, characterized in that, There are multiple limiting strips, and the multiple limiting strips are evenly distributed around the circumference of the positioning boss (20).

6. The insulation structure according to claim 2, characterized in that, The limiting part (21) is a limiting block that protrudes from the outer peripheral surface of the positioning boss (20) and the limiting block extends radially along the positioning boss (20).

7. The insulation structure according to claim 6, characterized in that, There are multiple limiting blocks, and the multiple limiting blocks are arranged at intervals along the axial and circumferential directions of the positioning boss (20).

8. The insulation structure according to claim 2, characterized in that, The outer surface of the limiting part (21) has an anti-slip texture to increase the friction between the limiting part (21) and the hole wall of the second center hole of the winding core.

9. The insulating structure according to any one of claims 1 to 8, characterized in that, The gasket body (10) and the positioning boss (20) are concentrically arranged, and the gasket body (10) and the positioning boss (20) are integrally formed.

10. The insulating structure according to any one of claims 1 to 8, characterized in that, In the axial direction of the gasket body (10), the axial thickness of the gasket body (10) is less than the axial thickness of the positioning boss (20).

11. The insulating structure according to any one of claims 1 to 8, characterized in that, The gasket body (10) is further provided with a second clearance hole (11), which is located on the outer periphery of the first central hole. The second clearance hole (11) is circular and is used to prevent the inflow of electrolyte; and / or, The gasket body (10) is also provided with a third clearance through hole (12). The third clearance through hole (12) is located on the outer periphery of the first central hole, and the third clearance through hole (12) is arc-shaped. The third clearance through hole (12) is used to avoid the tabs of the winding core.

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